[time-nuts] DMTD questions

Götz Romahn goetz at g-romahn.de
Tue May 28 12:46:24 EDT 2013

hi Bob,
I had the same problems which I solved (partly) the following way:

transformer tc1-1t is offered here: http://www.minikits.com.au/TC1-1T
for mixers I took TUF-1 which is rather similar to TUF-R3SM and got it 
here (you have to bend pins properly):
input transformers I got via ebay (160660972892). They are 75 Ohms 
instead of 50 Ohms, yes one has to compromise
power splitter also via ebay (251254674273). The are a little large but 
by you can fit it in.

I know there are some compromises but better than nothing. I am very 
satisfied with my DMTD. Nearly as good as W.J.Riley's.
An additional note for the DDS module: there are some glitches in the 
layout so beware and check all connections. Resistors and most 
capacitors are package 0604 other than on mixer module. LM6609 are 
different package also.
hope this helps Goetz

Am 27.05.2013 22:27, :
> Some time back I purchased from Stanley Reynolds the necessary boards 
> for the Riley DMTD.  I'm now looking at what's necessary to build out 
> these boards and the Mini Circuits parts are far and away the most 
> expensive parts, due principally to the 10 part minimum on several of 
> the items.
> I'm wondering if there are any others on the list who are 
> contemplating the Riley DMTD and might wish to split a Mini Circuits 
> parts order to ease the pain?
> I guess I should also ask if an alternate DMTD in the works and if so, 
> where does it stand at this time?
> Thanks,
> Bob Darby
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